1889953 has 4 divisors (see below), whose sum is σ = 2035348. Its totient is φ = 1744560.

The previous prime is 1889831. The next prime is 1889957. The reversal of 1889953 is 3599881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 1520289 = 608^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889953 - 2⁹ = 1889441 is a prime.

It is a Duffinian number.

1889953 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1889957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72678 + ... + 72703.

It is an arithmetic number, because the mean of its divisors is an integer number (508837).

2^1889953 is an apocalyptic number.

1889953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1889953 is a deficient number, since it is larger than the sum of its proper divisors (145395).

1889953 is a wasteful number, since it uses less digits than its factorization.

1889953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145394.

The product of its digits is 77760, while the sum is 43.

The square root of 1889953 is about 1374.7556146457. The cubic root of 1889953 is about 123.6375341159.

The spelling of 1889953 in words is "one million, eight hundred eighty-nine thousand, nine hundred fifty-three".